When large space needs to be covered within a building without hindrance and supports, architects often deploy waffle slabs as solution to the same. Analysis of such slabs lies in the two extremes, assuming the grid-work as simply supported system (all four edges) and deriving solutions based on displacement compatibility of beams or plates to arrive at an approximate simplified solution or carry out a detailed finite element analysis of the slab beam system based on any of the generalized finite element software available in the market. No analytical solution or quick computational tool exists except for the case of slabs with all edges simply supported.

 

Advantages:

  • Savings on weight and materials
  • Long spans
  • Attractive soffit appearance if exposed
  • Economical when reusable formwork pans used
  • Vertical penetrations between ribs are easy.